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<h1>Selected Publications (<A HREF=publications.html>Complete List</A>) </h1> 
<h3>Thesis</h3> 
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<li>PhD Thesis: Research on Keyword Extraction Using Document Topical Structure, 2011. (In Chinese) [<A HREF=publications/phd_thesis.pdf target=_blank>pdf</A>][<A HREF=publications/phd_slides.pdf>slides</A>]
<li>Master Thesis: Chinese Language Networks: Research and Applications, 2008. (In Chinese) [<A HREF=publications/master_thesis.pdf target=_blank>pdf</A>]
<li>Bachelor Thesis: Automatic Detection for IT New Terms, 2006. (In Chinese) [<A HREF=publications/bachelor_thesis.pdf target=_blank>pdf</A>] [<A HREF=publications/bachelor_thesis_slide.pdf target=_blank>slides</A>]
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<h3>Refereed Papers</h3> 
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<li><b>Zhiyuan Liu</b>, Xinxiong Chen, Maosong Sun. A Simple Word Trigger Method for Social Tag Suggestion. <i>The Conference on Empirical Methods in Natural Language Processing (EMNLP'11)</i>. [<A HREF=publications/emnlp2011.pdf>pdf</A>]
<li><b>Zhiyuan Liu</b>*, Xinxiong Chen*, Yabin Zheng, Maosong Sun. Automatic Keyphrase Extraction by Bridging Vocabulary Gap. <i>The 15th Conference on Computational Natural Language Learning (CoNLL'11)</i>. [<A HREF=publications/conll2011.pdf>pdf</A>][<A HREF=datasets/163_chinese_news_dataset_2011.zip>data</A>] (* indicates equal contribution)
<li><b>Zhiyuan Liu</b>*, Yabin Zheng*, Lixing Xie, Maosong Sun, Liyun Ru. User Behaviors in Related Word Retrieval and New Word Detection: A Collaborative Perspective. <i>ACM Transactions on Asian Language Information Processing (ACM TALIP)</i> (Special Issue on Chinese Language Processing), 2011. [<A HREF=publications/acmtalip2011.pdf>pdf</A>] (* indicates equal contribution)
<li><b>Zhiyuan Liu</b>, Yuzhou Zhang, Edward Y. Chang, Maosong Sun. PLDA+: Parallel Latent Dirichlet Allocation with Data Placement and Pipeline Processing. <i>ACM Transactions on Intelligent Systems and Technology (ACM TIST)</i> (Special Issue on Large Scale Machine Learning), Vol. 2, No. 3, 2011. [<A HREF="http://code.google.com/p/plda/">code</A>][<A HREF=publications/acmtist2011.pdf>pdf</A>]
<li><b>Zhiyuan Liu</b>, Wenyi Huang, Yabin Zheng, Maosong Sun. Automatic Keyphrase Extraction via Topic Decomposition. <i>The Conference on Empirical Methods in Natural Language Processing (EMNLP'10)</i>, 2010. Oral presentation, acceptance rate = 25% (overall), 14% (oral), 11% (poster). [<A HREF=publications/emnlp2010.pdf>pdf</A>]
<li>Xiance Si, <b>Zhiyuan Liu</b>, Maosong Sun. Modeling Social Annotations via Latent Reason Identification. <i>IEEE Intelligent Systems</i>, 2010.
<li>Xiance Si, <b>Zhiyuan Liu</b>, Maosong Sun. Exploring Subsumption Relations in Social Tags. <i>The 23rd International Conference on Computational Linguistics (COLING'10)</i>, 2010. Regular paper, acceptance rate = 19% (158 of 815). [<A HREF=publications/coling2010.pdf>pdf</A>]
<li><b>Zhiyuan Liu</b>, Peng Li, Yabin Zheng, Maosong Sun. Clustering to Find Exemplar Terms for Keyphrase Extraction. <i>The Conference on Empirical Methods in Natural Language Processing (EMNLP'09)</i>, 2009. Regular paper, acceptance rate = 22.5% (108 of 478). [<A HREF=publications/emnlp2009.pdf>pdf</A>] 
<li>Yabin Zheng, <b>Zhiyuan Liu</b>, Maosong Sun, Liyun Ru, Yang Zhang. Incorporating User Behaviors in New Word Detection. <i>The 21st International Joint Conference on Artificial Intelligence (IJCAI'09)</i>, 2009. Oral paper, acceptance rate = 25.7% (331 of 1,290). [<A HREF=publications/ijcai2009.pdf>pdf</A>]
<li><b>Zhiyuan Liu</b>, Yabin Zheng, Maosong Sun. Quantifying Asymmetric Semantic Relations from Query Logs by Resource Allocation. <i>The 13th Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD'09)</i>, 2009. Regular paper, acceptance rate = 11.54% (39 of 338). [<A HREF=publications/pakdd2009.pdf>pdf</A>]
<li><b>Zhiyuan Liu</b>, Maosong Sun. Asymmetrical Query Recommendation Method Based on Network-resource-allocation Dynamics. <i>The 17th International World Wide Web Conference (WWW'08)</i>, 2008. Poster paper. [<A HREF=publications/asymmetrical_query_recommendation_method_www2008.pdf>pdf</A>] [<A HREF=datasets/qr.zip>data</A>]
<li><b>Zhiyuan Liu</b>, Maosong Sun. Chinese Word Co-occurrence Network: Its Small World Effect and Scale-free Property. <i>Journal of Chinese Information Processing</i>, Vol. 21, No. 6, pp. 52-57, 2007. (In Chinese) [<A HREF=publications/chinese_cooccurrence_small_world2007.pdf>pdf</A>]
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<h3>Technical Reports</h3> 
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<li><b>Zhiyuan Liu</b>, Peng Li, Yabin Zheng, Maosong Sun. Community Detection by Affinity Propagation. <i>Technical Reports No. 001</i>, 2008.[<A HREF=techreports/TR001_thunlp_community_detection.pdf target=_blank>pdf</A>]
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